The preferred (and easiest) way to upload teams and participants is via the Scenario Editor.
However, you can add new Teams and players in the Facilitator Dashboard
- Make sure you are in the Manage Teams tab
- Select the option you need, as described in the image below
These options are useful if you need to assign positions to anonymous players or there's some problem with a player and you need his/her position to be assigned to anyone else.
If you want to create all your Teams, the best way to do it is in the Editor Tool.